Add UMA metrics to measure the effectiveness of views fuzzing

ash/wm/workspace/workspace_event_handler.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/wm/workspace/workspace_event_handler.h"
 
 #include "ash/screen_ash.h"
 #include "ash/shell.h"
 #include "ash/shell_delegate.h"
+#include "ash/touch/touch_uma.h"
 #include "ash/wm/coordinate_conversion.h"
 #include "ash/wm/property_util.h"
 #include "ash/wm/window_util.h"
 #include "ash/wm/workspace/workspace_window_resizer.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_delegate.h"
 #include "ui/base/events/event.h"
 #include "ui/base/events/event_utils.h"
 #include "ui/base/hit_test.h"
@@ skipping 92 matching lines @@
     }
     default:
       break;
   }
   ToplevelWindowEventHandler::OnMouseEvent(event);
 }
 
 void WorkspaceEventHandler::OnGestureEvent(ui::GestureEvent* event) {
   aura::Window* target = static_cast<aura::Window*>(event->target());
   if (event->type() == ui::ET_GESTURE_TAP &&
-      event->details().tap_count() == 2 &&
       target->delegate()->GetNonClientComponent(event->location()) ==
       HTCAPTION) {
-    ash::Shell::GetInstance()->delegate()->RecordUserMetricsAction(
-        ash::UMA_TOGGLE_MAXIMIZE_CAPTION_GESTURE);
-    ToggleMaximizedState(target);  // |this| may be destroyed from here.
-    event->StopPropagation();
-    return;
+    // Note: TouchUMA::GESTURE_FRAMEVIEW_TAP is counted twice for each tap.
+    TouchUMA::GetInstance()->RecordGestureAction(
+        TouchUMA::GESTURE_FRAMEVIEW_TAP);
+
+    if (event->details().tap_count() == 2) {
+      ash::Shell::GetInstance()->delegate()->RecordUserMetricsAction(
+          ash::UMA_TOGGLE_MAXIMIZE_CAPTION_GESTURE);
+      TouchUMA::GetInstance()->RecordGestureAction(
+          TouchUMA::GESTURE_MAXIMIZE_DOUBLETAP);
+      ToggleMaximizedState(target);  // |this| may be destroyed from here.
+      event->StopPropagation();
+      return;
+    }
   }
   ToplevelWindowEventHandler::OnGestureEvent(event);
 }
 
 void WorkspaceEventHandler::HandleVerticalResizeDoubleClick(
     aura::Window* target,
     ui::MouseEvent* event) {
   gfx::Rect max_size(target->delegate()->GetMaximumSize());
   if (event->flags() & ui::EF_IS_DOUBLE_CLICK &&
       !wm::IsWindowMaximized(target)) {
@@ skipping 36 matching lines @@
                                      origin.y(),
                                      work_area.width(),
                                      target->bounds().height()));
       }
     }
   }
 }
 
 }  // namespace internal
 }  // namespace ash